Filter.



No. 664,974. Patented Jan. .I, l90l.

B. T SEARIVNG.

vFILTER.

(Application filed May I3, 1899.) (No Model.) I

THE NORRIS mans 00.. mom-Luna" wmmm'oq p4;

sucked or drawn or siphoned.

IATENT OFFICE.

BENJAMIN T. SEARING, OF GARDEN CITY, NEW YORK, ASSIGNOR TO WELLESLEY W.GAGE, OF NEW YORK, N. Y.

FILTER.

SPECIFICATION formingpart of Letters Patent N 0. 664,974, dated January1, 1901. Application filed Mayl3, 1899. Serial No. 716,774- (No model.)

To all whom it may concern..-

Be it known that I, BENJAMIN T. SEARING, a citizen of the United States,and a resident of Garden City, in the county of Nassauand State of NewYork, have invented certain new and useful Improvements in Filters, ofwhich the following is a specification.

The present invention relates to filters of that kind in which theliquid to be filtered is drawn through the filtering material by suctionproduced in any manner, as by a pump or siphon, or by the mouth of theperson de siring to drink the filtered liquid. It has for its object athoroughly efficient filter particularly adapted to the use for which itis made, and especially to its employment as a mouthfilter for filteringdrinking, fluid of comparative impurity.

The improved filter consists of a casing preferably cylindrical informand containing one or more filtering-disks secured in position byprojections or lugs upon the casing and composed of any suitablematerial, such as that described herein or in the application of Gageand Searing, Serial No. 698,928, filed December 10, 1898. The casing isopen at or near its lower end to the source of the liquid to befiltered, while its upper end is provided with an outlet incommunication with a pipe or tube through which the fluid is In order toallow the fluid to be easily drawn through the filtering material and tosecure a gradual application of the suction-power to the liquid, wherebythe device may be used more conveniently as a mouth-filter, a space orwell is. formed between the outlet of the casing and'the filtering-disksfor containing a quantity of air, which, while being exhausted bysuction applied to the outlet-tube, gradually draws the liquid throughthe successive layers of filtering material.

The invention also has for its object the production of an efficient andcheap filtering material which is made in the form required from afiltering fabric or felt of an improved modified form of thefilter-casing inlet.

tity of animal wool, cotton, linen, jute, or wood pulpfiber or othersuitable fiber, preferably, is added to the pine-needle wool before orduring felting or weaving or otherwise making into fabric in order tomake the filtering material more coherent and porous and to enable thepine-needle wool to be formed into a'yarn or woven more readily.

When making a fabric of pine-needle wool and animal wool only, theproportions may be equal or as little as fifteen per cent. or twenty percent. of the pine-needle wool, and when adding cotton the constituentsapproximately may be in the proportions of thirty per cent., sixty percent., and ten per cent., respectively. It is obvious, however, that anysuitable proportion of the constituents may be made within the limits ofthe invention.

In the accompanying drawings, Figure 1 is a vertical section, partly inelevation, of the improved filter. Fig. 2 is a similar view of a Fig. 3is a cross-sectional view of the perforated plate separating thefiltering-disks from the air-well. Fig. i is a cross-sectional view of afilter, showing an improved separating disk between the filtering-padsand another modified casing-inlet. Fig. 5 is a bottom view of the formof filter shown in Fig. 4.

Referring to the drawings, the casing 1 contains a number offiltering-disks 2, separated from the well or space 3 in the upperportion of the filter by a perforated plate or disk of gauze 4:, whichmay present a convex side to the filtering material (see Figs. 3 and 4)and is held againsta shoulder 11, formed in the casing. The well is incommunication with a pipe or tube .5, which is provided with amouthpiece 6 and is employed to suspend the casing, so that anyconvenient position rela tive to the filter may be attained by the user.The bottom of the casing is covered with a detachable perforated cap 7,which is removed when the filter is to be cleaned or refilled with freshfiltering material.

-When using the filter for filtering water containing a thick or slimysediment to which the casing may be lowered inadvertently, the foreignmatter is prevented from entering the filter by employing a solid cap 8(see Fig. 2)

and forming openings 9 in the side of the easing provided with inturnedears or lugs 10, which are adapted to support the filteringdisks.

Referring to Fig. 4, the filtering-disks are preferably separated fromeach other by one or more lenticular disks, each consisting of twoperforated plates 13 13, placed together, with their concave sidesadjacent to each other, whereby the disk may be made simple and cheap aswell as efficient and may form a second well 18 for a similar purpose tothat of the well 3 already described. The inletopening is preferablyprovided with a perforated disk 24, with a convex side toward theadjacent filtering-pad, so that, together with the separating-disks, thefiltering material may be forced against the side of the casing toprevent escape and flow of water around their edges. The lower disk 14is held in place above the lugs 16 on the casing and may be detached byturning it by means of the plane-sided projection until the notch 17registers with one of the lugs.

The inlet-plate may be provided with a knob 19 for detaching it from thecasing and to prevent the filter from sinking in any sediment in whichit may be placed.

What is claimed is- 1. The herein-described fabric consisting ofpine-needle wool and another fiber adapted to be made into felt orfabric.

2. The herein-described fabric or felt consisting of pine-needle wooland animal Wool.

3, The herein-described fabric or felt consisting of pine-needle wool,animal wool and cotton.

1. The herein-described filtering material consisting of pine-needlewool intermingled with another fiber and formed into pads.

5. The herein-described filtering material consisting of pine-needlewool intermingled with animal wool and formed into pads.

6. The herein-described filtering body or pad, consistingof a mixture ofpine-needle wool, animal wool, and cotton.

7. In a filter adapted to be used With suction-power, the combination ofa casing, an outlet, a body of filtering material within the saidcasing, a closed end to the said casing, side openings entering thecasing, and lugs projecting inwardly and adapted to support thefiltering material, as described.

Signed at New York, in the county of New York and State of New York,this 7th day of April, A. D. 1899.

BENJAMIN T. SEARING.

Witnesses:

FLORENCE RosENsTEnL, AXEL V. BEEKEN.

